Cover knob



March 25, 1952 C, W, FRY 21,590,395-

COVER KNOB Filed oct. 13,I 1949 VINVENTOR. CL/FFOEJJ W-FBY PatentedlMar. 25, 17952 I COVER KNOB Clifford W. Fry, Wooster, Ohio, assignor toThe Buckeye Aluminum Company, Wooster, Ohio, a

corporation of Ohio Application october 13, 1949, serial No. 121,121

2 Claims.

' vide a threaded metal stamping which may be welded, soldered, orotherwise attached to a metal body to facilitate the support of a moldedplastic knob, ornament, or similar non-metallic part.

Another object of the invention is too provide a pressed or die-struckmetal cup having a rounded thread in the side wall thereof andconstituting a stud for the support of a non-metallic knob or the likeformed with a molded or cast thread therein of similar form.

Another object of the invention is to form a threaded cylindricalstamping from thin metal stock capable of providing suii'icient iiexureto accommodate engagement thereof with a molded thread in anon-resilient part.

Another object of the invention is to provide a knob stanchion in theform of a deep-drawn shell or cup, configured for the attachment of thebase thereof upon a metal body, for threaded engagement with anon-metallic part, and for sealed engagement of the lower end thereofwith the face of the metal body.

A further object of the invention is to provide a handle for a pan lidembodying/a thin walled non-metallic knob having a sheet metal cupthreaded therein, the assembly defining an air cell within the handlefor the insulation thereof.

Another object of the invention is to provide a thin sheet metal cuphaving a rounded thread formed in the side wall thereof, the diameter ofthe cup being relatively large in order to provide a base of an area ofsuiiicient size to accommodate the rigid securement of the cup uponanother body.

Other objects and advantages, more or less ancillary to the foregoing,and the manner in which all the various objects are realized will Itrated in Fig. 1, the section being on a plane indicated by the line 2-2in Fig. 1; and

Fig. 3 is a transverse section through the knob,

2 the section being taken on the line 3 3 of Fig. 2.

Referring first to Fig. 2, the pan lidchosen herein as illustrative ofone of the environs within which the invention may be used comprises adished metal plate lIl) formed with a depending circumferential ange I Iand a fiat central area I2 for reception of the knob and supportingstanchion therefor. If desired, the entire face of the plate may becurved, and the lower face of the supporting stanchion and knob may beformed complementary thereto.

The knob-supporting post or stanchion comprises a cup I3 of a diameterwhich will assure the stability of the part when the base thereof isbrazed, welded, or soldered to the plate III. The cup is die-struck anddrawn from thin sheet metal stock capable of appreciable iiexure, and arounded thread I4 is formed in the side wall thereof. The knob I5 ascontemplated herein is formed from a non-metallic material such as amolded resinous plastic, a thread of similar form to that in the cupbeing cored therein during the molding operation. The side wall of theknob is relatively thin, and the lower end thereof is con-gured forsealed engagement with the face of the plate I0 when drawn into impingedrelation therewith in order to prevent the admission of water andforeign matter into the void defined by the cup and recess in the knob.

With a, structure of this type it will be recognized that a light,hollow, non-metallic knob or handle may be effectively attached to ametal cover for a cooking utensil; that the thin side Walls of the knobassembly and the air cell therein will tend to lower the transfer ofheat thereto; that the knob, whenl drawn into abutting engagement withthe lid, will impose a strain upon the threads and thus restraincounter-rotational movement thereof; and that the yieldable side wall ofthe cup will accommodate the assembly of the knob or an ornament whichis formed with an inflexible wall having a cast or molded threadtherein;

Although the foregoing description is necessarily of a detailedcharacter, in order that the invention may be completely set forth, itis to be understood that the specific `terminology is not intended to berestrictive or confining, and

that various rearrangements of parts and modications of detail may beresorted to without departing from the scope or spirit of the inventionas herein claimed.

I claim:

l. A knob assembly for a cooking utensil comprising a thin walledductile metallic cup of a depth substantially equal to the diameterthereof, a screw thread rolled in the side wall of said cup, the base ofthe cup being adapted for afxation upon a cooking utensil, a mouldednonmetallic hollow knob, a moulded internal screw thread therein ofcomplementary conguration to the threads on the cup, said knob beingscrewed upon said cup and being adapted for abutting engagement with theface of a cooking utensil to effect impingement of the threads in thecup and knob, the walls of the cup and knob dening a Void constitutingan insulating medium for the knob.

2. A knob assembly for a cooking utensil comprising a thin walledductile metallic cup of a depth substantially equal to the diameterthereof, a screw thread rolled in the side wall of said cup. the base ofthe cup being adapted for aixation upon a cooking utensil, a mouldednon-metallic hollow knob, a moulded internal screw thread therein ofcomplementary configuration to the threads on the cup, said knob beingscrewed upon said cup and being adapted for abutting engage- Cil 4 mentwith the face of a cooking utensil to effect a sealed relation betweenthe ductile metal threads in the cup and knob, and the contiguous facesof the knob and cooking utensil, the walls of the cup and knob defininga void substantially equal in size to the volumetric capacity of the cupand constituting an insulating medium for the knob.

CLIFFORD W. FRY.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS 1.2.-,- I- I l

